Your "original picture" is a JPG, not DNG. So where did it come from? Did the camera make that JPG, or some other software?

There are two obvious differences: colour and tone. I suspect the colour difference is due to different colour balances being used. If your IM uses an external delegate such as dcraw, you can edit delegates.xml to suit, eg insert "-w" to tell dcraw to use the camera white balance.

The other major difference is tone. This is likely due to whatever make your "original" jpg prettifying the image. For example, this almost merges the rope and background top-left. Manufacturers don't publish their "prettifying" algorithms.

There are two obvious differences: colour and tone. I suspect the colour difference is due to different colour balances being used. If your IM uses an external delegate such as dcraw, you can edit delegates.xml to suit, eg insert "-w" to tell dcraw to use the camera white balance.

The other major difference is tone. This is likely due to whatever make your "original" jpg prettifying the image. For example, this almost merges the rope and background top-left. Manufacturers don't publish their "prettifying" algorithms.